CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY (Unaudited) - USD ($) $ in Millions	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Treasury Stock [Member]	Non-controlling Interests [Member]	Total		Cumulative Effect, Period of Adoption, Adjustment [Member] Common Stock [Member]	Cumulative Effect, Period of Adoption, Adjustment [Member] Additional Paid-in Capital [Member]	Cumulative Effect, Period of Adoption, Adjustment [Member] Retained Earnings [Member]	Cumulative Effect, Period of Adoption, Adjustment [Member] Accumulated Other Comprehensive Income (Loss) [Member]	Cumulative Effect, Period of Adoption, Adjustment [Member] Treasury Stock [Member]	Cumulative Effect, Period of Adoption, Adjustment [Member] Non-controlling Interests [Member]	Cumulative Effect, Period of Adoption, Adjustment [Member]
Balance at Dec. 31, 2018	$ 4.9	$ 431.9	$ 1,769.1	$ (233.7)	$ (618.7)	$ 31.8	$ 1,385.3
Balance (ASU 2018-02 [Member]) at Dec. 31, 2018									$ 0.0	$ 0.0	$ 10.9	$ (10.9)	$ 0.0	$ 0.0	$ 0.0
Net income	0.0	0.0	39.1	0.0	0.0	0.9	40.0
Other comprehensive income (loss)	0.0	0.0	0.0	1.9	0.0	0.5	2.4
Dividends declared	0.0	0.0	(1.7)	0.0	0.0	0.0	(1.7)
Dividends paid to non-controlling interests	0.0	0.0	0.0	0.0	0.0	(0.1)	(0.1)
Capital contribution from non-controlling interests	0.0	0.0	0.0	0.0	0.0	0.8	0.8
Issuance of shares pursuant to employee stock compensation plans	0.0	0.1	0.0	0.0	0.0	0.0	0.1
Stock-based compensation	0.0	0.6	0.0	0.0	0.0	0.0	0.6
Balance at Mar. 31, 2019	4.9	432.6	1,817.4	(242.7)	(618.7)	33.9	1,427.4
Balance at Dec. 31, 2018	4.9	431.9	1,769.1	(233.7)	(618.7)	31.8	1,385.3
Balance (ASU 2018-02 [Member]) at Dec. 31, 2018									$ 0.0	$ 0.0	$ 10.9	$ (10.9)	$ 0.0	$ 0.0	$ 0.0
Net income							67.6
Other comprehensive income (loss)							(17.9)
Balance at Jun. 30, 2019	4.9	435.3	1,842.2	(262.8)	(628.7)	30.7	1,421.6
Balance at Mar. 31, 2019	4.9	432.6	1,817.4	(242.7)	(618.7)	33.9	1,427.4
Net income	0.0	0.0	26.6	0.0	0.0	1.0	27.6
Other comprehensive income (loss)	0.0	0.0	0.0	(20.1)	0.0	(0.2)	(20.3)
Dividends declared	0.0	0.0	(1.8)	0.0	0.0	0.0	(1.8)
Dividends paid to non-controlling interests	0.0	0.0	0.0	0.0	0.0	(3.8)	(3.8)
Capital contribution from non-controlling interests	0.0	0.0	0.0	0.0	0.0	(0.2)	(0.2)
Issuance of shares pursuant to employee stock compensation plans	0.0	0.2	0.0	0.0	0.0	0.0	0.2
Stock-based compensation	0.0	2.5	0.0	0.0	0.0	0.0	2.5
Purchase of common stock for treasury	0.0	0.0	0.0	0.0	(10.0)	0.0	(10.0)
Balance at Jun. 30, 2019	4.9	435.3	1,842.2	(262.8)	(628.7)	30.7	1,421.6
Balance at Dec. 31, 2019	4.9	442.2	1,905.7	(290.4)	(659.7)	31.9	1,434.6	[1]
Net income	0.0	0.0	38.6	0.0	0.0	1.0	39.6
Other comprehensive income (loss)	0.0	0.0	0.0	(37.8)	0.0	(1.4)	(39.2)
Dividends declared	0.0	0.0	(1.7)	0.0	0.0	0.0	(1.7)
Capital contribution from non-controlling interests	0.0	0.0	0.0	0.0	0.0	0.7	0.7
Issuance of shares pursuant to employee stock compensation plans	0.0	0.5	0.0	0.0	0.0	0.0	0.5
Stock-based compensation	0.0	0.1	0.0	0.0	0.0	0.0	0.1
Purchase of common stock for treasury	0.0	0.0	0.0	0.0	(22.6)	0.0	(22.6)
Balance at Mar. 29, 2020	4.9	442.8	1,942.6	(328.2)	(682.3)	32.2	1,412.0
Balance at Dec. 31, 2019	4.9	442.2	1,905.7	(290.4)	(659.7)	31.9	1,434.6	[1]
Net income							54.5
Other comprehensive income (loss)				(26.5)			(26.8)
Balance at Jun. 28, 2020	4.9	445.5	1,955.3	(316.9)	(682.3)	34.3	1,440.8	[2]
Balance at Mar. 29, 2020	4.9	442.8	1,942.6	(328.2)	(682.3)	32.2	1,412.0
Net income	0.0	0.0	14.4	0.0	0.0	0.5	14.9
Other comprehensive income (loss)	0.0	0.0	0.0	11.3	0.0	1.1	12.4
Dividends declared	0.0	0.0	(1.7)	0.0	0.0	0.0	(1.7)
Dividends paid to non-controlling interests	0.0	0.0	0.0	0.0	0.0	(0.5)	(0.5)
Capital contribution from non-controlling interests	0.0	0.0	0.0	0.0	0.0	1.0	1.0
Issuance of shares pursuant to employee stock compensation plans	0.0	0.2	0.0	0.0	0.0	0.0	0.2
Stock-based compensation	0.0	2.5	0.0	0.0	0.0	0.0	2.5
Balance at Jun. 28, 2020	$ 4.9	$ 445.5	$ 1,955.3	$ (316.9)	$ (682.3)	$ 34.3	$ 1,440.8	[2]

[1] Condensed from audited financial statements

[2] Unaudited